No abstract

Long non‐coding RNAs (lncRNAs) have been identified as playing critical roles in multiple diseases. However, little is known regarding their roles and mechanisms in post‐stroke angiogenesis. Our studies focused on deciphering the functional roles and the underlying mechanisms of the lncRNA metastasis‐associated lung adenocarcinoma transcript 1 (MALAT1) in the process of angiogenesis following oxygen‐glucose deprivation/reoxygenation (OGD/R). We characterized the up‐regulation of MALAT1 expression in the process of angiogenesis after hypoxic injury in vivo and in vitro. We further showed that compared with the empty vector, MALAT1 knockdown had significantly reduced the capacity for angiogenesis, which was measured by 3‐(4,5‐dimethylthiazol‐2‐yl)‐2,5‐diphenyltetrazolium (MTT), scratching, cell cycle and immunofluorescent staining. Thus, our findings suggest that MALAT1 may mediate proangiogenic function in OGD/R. To further explore the potential mechanisms, we used lentiviruses expressing shMALAT1 and empty vector; the results revealed that shMALAT1 reduced the expression of 15‐lipoxygenase 1 (15‐LOX1), vascular endothelial growth factor (VEGF) and the phosphorylation of signal transducers and activators of transcription 3 (pSTAT3). Taken together, our results are the first to propose that MALAT1 may regulate angiogenesis through the 15‐LOX1/STAT3 signalling pathway, and they may provide a critical target for the treatment of hypoxic injury and an avenue for therapeutic angiogenesis.

The frequencies of human leucocyte antigen (HLA)-A, -B and -DRB1 alleles and haplotypes were statistically analysed among 3238 donors from Chinese Marrow Donor Program (CMDP) Jiangsu Branch. All donors were typed using polymerase chain reaction-sequence-based typing (PCR-SBT) method or polymerase chain reaction-reverse sequence-specific oligonucleotide probe (PCR-rSSOP) method. As a result, a total of 46 A, 85 B and 51 DRB1 alleles were found in Jiangsu population. The first three frequent alleles in HLA-A, -B and -DRB1 loci respectively were A*11:01(16.52%), A*24:02(15.10%) and A*02:01(13.02%); B*13:02(11.60%), B*46:01(8.89%) and B*58:01(7.12%); and DRB1*07:01(15.78%), DRB1*09:01(15.26%) and DRB1*15:01(9.76%). The top two frequent A-B-DRB1 haplotypes were A*30:01-B*13:02-DRB1*07:01(8.87%) and A*02:07-B*46:01-DRB1*09:01(2.79%); the top three A-B haplotypes were A*33:03-B*58:01-DRB1*03:01(2.59%), A*30:01-B*13:02(9.92%) and A*33:03-B*58:01(5.48%); the top two B-DRB1 haplotypes were B*13:02-DRB1*07:01(10.23%) and B*46:01-DRB1*09:01(4.61%); the top two A-DRB1 haplotypes were A*30:01-DRB1*07:01(8.96%) and A*33:03-DRB1*13:02(3.95%). These findings provided useful information in the study of genetics and anthropology in Chinese Han population. It also served as a basic guide for selection of future donors in CMDP Jiangsu Branch.

AIM:To explore the effect of diabetic duration and blood glucose level on insulin like growth factor 1 (IGF-1) gene expression and serum IGF-1 level.